Robbers in Ellesmere Port attacked a man from behind and stole his mobile phone.
An appeal has been launched to find the offenders, who got away from the scene in Princes Road on push-bikes.
The 31-year-old victim, who is from Ellesmere Port, was stood next to a parked vehicle near the railway footbridge at about 12.20pm on December 22.
He was approached from the back by two men and as he opened the passenger door was hit from behind then shoved inside.
The robbers then climbed into the vehicle and stole the phone, before cycling off.
Investigation officer DC Rob Moore said: “This incident took place on a busy road and in close proximity to a number of shops and businesses.
“I believe that there may be people who were in the area at the time of the incident who can assist with our enquiries.
“I urge anyone who believes they have got any information to contact me and my team to help with our investigation.”
The offenders are both described as white men and of slim build.
At the time of the crime they were both wearing black clothing and riding dark-coloured mountain bikes.
Anyone who witnessed the robbery or who has information should contact Cheshire Police on 101 quoting incident number 337 of December 22, 2015.
They can also call Crimestoppers anonymously on 0800 555 111.